crawford



No. 6|9,|42. Patented Feb. 7, |899.

r F. CRAWFORD.

STOP MEGHANISM FOR KNITTING MACHINES.

(Application led June 6, 1898.\

2 Sheets- Sheet l.

(No Model.)

...Il Il /1 INH WITNESSES:

ATTORNEYS No. -6|9',l42. Patented Feb. 7, |899. F. CRAWFORD. sToPMEcHANlsM For: KNITTING MACHINES.

(Application filed .Tune 6, 1S98.\

2 Sheets-Sheet 2.

(No Model.)

INVENTOR Hanf @maf/Zara( l ,ZI

WITN ESSES ATTORNEYS UNITED STATES PATENT OEEICE.

FRANK CRAWFORD, OF NEW BRUNSWICK, NEV JERSEY, ASSIGNOR TO THE CRAVFORDMANUFACTURING COMPANY, OF SAME PLACE.

STOP MECHANISM FOR KNlTTlNG-IVIACHINES.

SPECIFICATION forming part of Letters Patent No. 619,142, dated February'7, 1899. E Application led June 6, 1898- Serial No. 682,702. (Nomodel.)

To LZZ whom it may concern:

Be it known that I, FRANK CRAWFORD, a citizen of the United States,residing at New Brunswick, in the county of Middlesex and 5 State of NewJersey, have invented new and .useful Improvements in Stop Mechanism forKnitting-Machines, of which the following is a specification.

This invention resides in the novel features ro ofconstructiou setforthin the following specication and claims, and illustrated in theannexed drawings, in which- Figure 1 is an elevation, partly in section,of the mechanism. Fig. 2 is a section along w w,

15 Fig. 1. Fig. 3 is a section along :n cc, Fig. 1. Fig. et is a sectionalong y y, Fig. 1. Fig. 5 is a section along z a, Fig. 1. Fig. Gis aside elevation of Fig. 5.

In the drawings the letter G, Fig. 1, indizo Cates the releasing-finger.This thread feeler or finger G while held up by thread E will be out ofaction; but when said finger drops by the slacking or breaking of thethread the slide R is actuated in manner similar to that z 5 set forthin United States Letters Patent No.

510,839, granted on my application filed December 12, 1893. The threador threads come from bobbins 1 on bobbin rack or carrier 2, secured toshaft A, said shaft, with the bobbin- 3o rack, being made to rotate. Theslide R by a pin and crank-arm connection 3 and 4t engages therock-shaft f, having suitable bearings or supports, such as the guide orplate 5, rotating with shaft A, and the arm or support 6,

3 5 secured to or rotating with the bobbin-rack.

It is thus seen that the shaft A, bobbin-carrier 2, with its bobbin,feelersG, slide R, and rock-shaft f and its bearings 5 6 all rotatetogether.

4o From shaft j' extends a crank or arm 7, en-

gaging alock or latch-rod 8, Figs. 2 and 3. A ring 9 rests on a flangeor support 10, Fig. 1, suitably secured, as by screws Vor fastenings 11,to rotary bobbin-rack 2. The ring 9 rests 45 loose on its bearing orsupport 10, so as to be normally at rest or not to partake of therotation of rack 2. Should, however, a thread break or slacken, theslide R, as explained in said Patent No. 510,839, will move longitudi-5o nally or spring inward and willrock or give a suitable or partialrotation to shaft f, so that the arm 7 will slidelatch or iin ger 8outward or to engaging position to strike one of the teeth 12, Fig. 2,on ring 9. The ring is shown with twelve such teeth; but of course thisnumber 5 5 can be varied, if seen fit.

When the lock 8 is withdrawn, as seen in Fig. S-that is to say, when theparts are in working order and the slide or actuator R held in orback-'the lock 8, rotating with the 6o bobbin-rack, clears the teeth 12and the ring 9 rests stationary on its support 10. When, however, thelatch 8 is moved to locking position, Fig. 2, or strikes a tooth 12, thering 9 is actuated, so that its finger or stud 13, 65 Fig. 1, engagesthe arm or finger 14, which, with its bracket or carrier 15, is suitablysecured or adjusted on shaft 16. This shaft 16 being suitably actuatedor rocked can bring the brake or stopping mechanism into action 7o insuitable manner.

In the drawings is shown a stop and brake mechanism similar to that ofsaid Patent No. 510,839, the arm S', Figs. 5 and 6, when withdrawn fromnotch U allowing rod V to de- 75 scend to swing lever Z', Fig. 4, torelease shifter-rod b', which shipper b engages the belt.

The lever h when free to be actuated by its spring z" will put the shoeor brake m into 8o action.

The rod V,as seen in Fig. 1, is not connected to leverZ; but,asexplained in said Patent No. 510,839, the rod V in its fall lands onlever Z to swing the latter, as stated. 85

The shaft 16, as seen in Fig. 5, has a foot or lug 17, which when theshaft 16 is rocked will swing lever 18 19, so that arm 19 swings lever20 21, Fig. 6, against the action of spring 22, so as to withdraw arm 21from the lug 23 9o on lever h', rendering its spring t" free to movelever h into braking position.

The 4lever-arm 19 carries a shoulder 24., Fig. 5, engaging lever 25 26,having a piece 27 engaging arm 28 on shaft 29, carrying arm S'. 95 Thispiece 27 can be properly set or adjusted by screw 30. lVhen the shaft 16is rocked, the lever 18 19 by shoulder 24 swings lever 25 26, so thatarm 26 or piece 27 swings arm 28 and shaft 29 to withdraw arm S' fromrod V. roo

'the finger 13 of ring 9 when the latter is locked to or moved by therotary bobbin holder 2. The rock-shaft f is located and is carried aboutwithin the ring 9, the internal orinwardly-projecting teeth 12 beingadapted for engagement bythe latch 8 of shaft f. In speaking of teeth12, one such tooth could of course answer; but a series of teeth 12 isof advantage, as thereby a tooth is always in proximity to the latch 8to be promptly caught by such latch when sprung. When the latch 8 isclear or withdrawn, Fig. 3, the finger 13, resting against finger 14,holds the ring 9 stationary, so that it will normally not partake of therotation of bobbin-rack 2. The ring-holder or flange 10 is shown securedclose to or in direct contact with the bobbinholder, but of course couldbe caused to depend therefrom, or said ring could be applied away fromthe bobbin-rack a greater or less distance at any suitable point, ifseen iit.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination with a rotary bobbinrack, a toothed ring mounted incontact with the rack, and belt-shifting or brake mechanism engaged bythe ring, of a latch-rod carried by the rack and adapted to engage theteeth on said ring, a rock-shaft having a crank-arm thereon engagingsaid .latch-rod, a thread-feeler supported by the thread, and meansactuated by the descent of said feeler, for rocking said shaft,substantially as described.

2. A stop mechanism comprising a rockshaft, a slide or actuator for theshaft, a rotary bobbin-rack on which the shaft is mounted, a lockactuated by the shaft, a belt-shifting or brake mechanism, and aconnecting or transmitting mechanism between the lock and shiftingmechanism substantially as de- V scribed. v

3. A stop mechanism comprising a rockshaft, a slide or actuator for theshaft, a rotary bobbin-rack for carrying the shaft, a latch or fingeractuated by the shaft, a toothed ring engaged by the latch, and ashifter or brake mechanism engaged by the rirg substantially asdescribed.

4. A stop mechanism comprising a rockshaft, a slide or actuator for theshaft, a latch or finger actuated by the shaft, and a toothed ringwithin which the rock-shaft is located and provided with internal teethadapted to be engaged by the latch and a shifter or brake mechanismsubstantially as described.

5. A rotary bobbin-rack, a toothed ring supported on the rack, arock-shaft, a thread-finger and actuator for the shaft, and a latchactuated by the shaft for engaging the teeth of the ring and a shifteror brake mechanism engaged by the ring substantially as described.

6. A rotary bobbin-rack, a toothed ring supported on the rack, arock-shaft, a thread-finger and actuator for the shaft, a latch actuatedby the shaft for engaging Athe teeth of the ring, and a shipper orbrake-actuating' mechanism substantially as described, saidy mechanismand ring being in engagement so that the ring is held stationary or-non-rotating when the latch is unlocked or clear substantially asdescribed.

'7. A rotary bobbin-rack having a supporting-flange, a ring looselymounted or supported on the iiange, a rock-shaft carried by thebobbin-rack, a thread-finger and actuator for the shaft, a lock actuatedbythe shaft for engaging the ring, and a shipper or brakeactuatin gmechanism substantially as described engaged by the ring. y

8. A rotary shaft provided with a bobbinrack, a thread-feeler and arock-shaft carried by the rotary shaft, a shipper or brake-actuatingmechanism substantially as described, a ring normally held stationary bysaid mechanism, and a lock actuated by the rock-shaft for impartingmotion from the rotary shaft to the shipper mechanism substantially asdescribed.

In testimony whereof I have hereunto set witnesses.

FRANK CRAWFORD. Witnesses: W. C. I-IAUFF,

E. F. KASTENHUBER.

my hand in the presence of two subscribing v

